Adjustable DC Powers Supply
The Dc power Supply can be used to substitute for the Battery Voltage when do live voltage checking on the PCB circuits... This is being used to trace the power supply line in electronic circuit.
Linear Adjustable DC Power Supply is a equipment with high stability, high reliability, low noise, its output voltage or current can be continuously adjusted, and its constant voltage and current can auto-conversion. This universal power supply can be used in many different areas, from test of R&D equipment to test of production lines.
Here's a sample of substituting DC voltage in working cellphone repair tracing B+ line.